A construction company accused of taking part in a bribery scheme with HISD trustee Larry Marshall has dropped its unrelated lawsuit against the school district.

Fort Bend Mechanical sued the Houston Independent School District in late May claiming it was owed $9.8 million for construction jobs. But less than a month later, the company withdrew its lawsuit in Harris County court without offering an explanation.

The company owner, David "Pete" Medford, and his attorney did not return messages seeking comment.

In a separate federal lawsuit, Medford is accused of participating in a bribery and kickback scheme that helped his company land HISD contracts and enriched Marshall. Medford, Marshall and the school district have denied wrongdoing.

The general counsel for HISD, Elneita Hutchins-Taylor, said the district may negotiate with Fort Bend Mechanical over the amount still owed under its contracts.

However, Hutchins-Taylor said, "It will absolutely not result in anything close to what the plaintiffs were seeking in the lawsuit."

HISD so far has paid Fort Bend Mechanical about $23 million for the six projects in question, according to information provided Thursday under a public-records request. The value of the initial contracts totaled $40 million, and the last payment was made Jan. 31, according to the HISD records.

Medford's company had been doing renovation work at several schools when HISD officials asked him to halt in December 2012, according to HISD records. The schools involved are Kashmere Gardens Elementary; Johnston and Long middle schools; and Westbury, Waltrip and Worthing high schools.

Medford, in his lawsuit, alleged that problems and delays with some projects were HISD's fault.